Oil-Free Screw Compressors

AQ 30-55 / 15-55 VSD
Water-injected screw compressors

Atlas Copco’s AQ water-injected screw compressors, available in water-cooled and air-cooled versions, meet your precise needs for pure, oil-free air while offering high-pressure capability and improved energy efficiency. Developed especially for applications demanding the highest levels of purity, such as pharmaceutical production, food processing and critical electronics, AQ compressors eliminate the risks of oil contamination as well as the resulting extra costs. They ensure consistent 100% oil-free air while you benefit from lower operating and maintenance costs with an ISO 8573-1 CLASS 0 (2010) certified compressor.

Features and Benefits

High efficiency – Thanks to the superior cooling capability of water which ensures that the heat is removed efficiently at the source, more air per kW of power is generated. Energy savings of up to 35% are possible with the Variable Speed Drive versions:
– Load/no load transition losses are eliminated.
– Precise pressure control allows a tighter pressure band and a lower average working pressure, resulting in reduced energy consumption.

Quiet operation – AQ compressors are supplied in a sound-insulated canopy, thus avoiding the need for a separate compressor room and allowing installation in most working environments.

Advanced control and monitoring – To maximize efficiency and reliability, the Elektronikon® controls the main drive motor and regulates system pressure within a predefined and narrow pressure band. The Elektronikon® controller can be adapted to your specific needs with extra sensors, digital contacts, fieldbus, Internet and SMS communication functions. In combination with the ES multiple compressor controller, the operation of your complete compressor room is optimized.

Technical Specifications

Capacity FAD (l/s)

21.9 – 161.7 l/s

Capacity FAD (m³/h, cfm)

47 – 342.6 cfm

Working pressure

107 – 189 psig

Installed motor power

20 – 75 HP

ER 90-900
Energy recovery control unit for water-cooled oil-free air compressors from 90 to 900 kW

Atlas Copco energy recovery control units transfer the energy recovered in the cooling water of oil-free air compressors to your process. The control unit is installed between the compressor and your cooling and heating circuit. The design ensures perfect and easy integration of energy recovery systems in a wide variety of different applications.

Specifically designed to transfer the energy recovered from the oil-free compressor to your process.

Ultimate reliability under the harshest operating conditions.

Single interface between your compressed air system and your process.

Regulation of compressor cooling water pressure and temperature to keep the compressed air system working optimally.

Compressors operate independently from your heat requirement process.

Easy to guarantee optimal quality of cooling water from compressor(s).

Up to four ZR compressors can be connected to one energy recovery control unit.

Standard set-up can be extended with a number of application specific options.

Designed, manufactured and tested in accordance with ISO 9001 and ISO 1400.

Atlas Copco’s Z 55-900 VSD Pack and Full Feature ranges power your production with ultimate reliability and efficiency under the harshest conditions. The first air compressors in the world to be certified Class 0 according to ISO 8573-1 edition 3, 2010, they ensure completely oil-free air to protect your process and end products. Several energy saving features – Variable Speed Drive, energy-free MD dryers and energy recovery – are offered. Z 55-900 VSD compressors are all-inclusive, plug-and-play packages that ensure easy and low cost installation and a quick start-up.

Features and Benefits

Highest reliability – For over 50 years, Z compressors stand for durability and reliability. They incorporate Atlas Copco’s proven screw technology, stainless steel coolers, AGMA A4/DIN 5 gears and state-of-the art electrical drive systems, all of which contribute to overall high reliability. Z compressors are built using long-standing internal engineering practices, and are manufactured and tested according ISO 9001.

Easy installation – The integrated design of the Z compressor includes internal piping, coolers, motor, lubrication and control system: all supplied as a ready-to-use package. Installation is fault-free, commissioning time is low and no external instrument air is required.

Advanced control and monitoring – To maximize efficiency and reliability, the Elektronikon® controls the main drive motor and regulates system pressure within a predefined and narrow pressure band. The Elektronikon® controller can be adapted to your specific needs with extra sensors, digital contacts, fieldbus, Internet and SMS communication functions. In combination with the ES multiple compressor controller, the operation of your complete compressor room is optimized.

Technical Specifications

Capacity FAD (l/s)

121 – 2456 l/s

Capacity FAD (m³/h, cfm)

256 – 5204 cfm

Working pressure

101.5 – 150 psig

Working pressure variant 13 bar

147 – 369 HP

Installed motor power

75 – 1253 HP

ZE/ZA (VSD)
Oil-free rotary screw compressors

Especially in harsh and dusty environments, a reliable supply of 100% certified oil-free compressed air is critical to ensure production continuity. Atlas Copco’s low pressure ZE/ZA compressors fulfill this demand by offering a constant air flow at minimal energy costs. Integrated Variable Speed Drive (VSD) variants offer up to 35% extra energy savings by automatically tuning compressor flow to the precise air demand.

Reduced energy costs – With an air circuit designed to avoid and reduce pressure drops, the ZE/ZA is built to save energy. Features like VSD drive, a state-of-the-art oil-free compression element, and energy recovery greatly enhance energy savings.

Easy installation – The compact design eliminates the need for extras and reduces installation to an absolute minimum, saving you time and money. Built for easy integration in your existing compressed air network, ZE/ZA compressors are up and running in no time.

Technical Specifications

Capacity FAD (l/s)

67 – 2105 l/s

Capacity FAD (m³/h, cfm)

141.7 – 4455.86 cfm

Working pressure

14.5 – 58 psig

Installed motor power

30 – 700 HP

ZT 110-160 Classic
Oil-free air rotary screw compressors

Atlas Copco is renowned for designing and manufacturing the most reliable oil-free screw compressors. The ZT 110-160 is the latest rotary screw compressor to come out of this strong tradition. Ideal for harsh conditions, the ZT offers a compact robust design and low operating cost to industries where high-quality oil-free air is key.

Features and Benefits

Keeping your production up and running – For over 50 years, Atlas Copco Z compressors have set the benchmark for durability. They are built using long-standing internal engineering practices, and are designed, manufactured and tested according to ISO 9001. The ZT 110-160 uses proven screw technology, cooling and pulsation dampers.

Easy installation – With the ZT 110-160 compressor, Atlas Copco provides a complete solution without hidden costs. The ready-to-use package includes internal piping, coolers, motor, lubrication and control system. Installation is fault-free, commissioning time is low and no external instrument air is required. You simply plug and run.

Assuring your peace of mind – From the factory to the field, Atlas Copco has the expertise and products, service and support to meet customer demands. We invest continuously to ensure a committed, competent service organization. Thanks to our presence in over 170 countries we offer timely, professional service worldwide with 24/7 availability.